Two-storey extensions for detached houses in Isle of Mull
If you live in Isle of Mull and need more room without moving, a two-storey extension for a detached house is worth a serious look. We handle the drawings, approvals, structure and build.
Isle of Mull is outside our usual mainland visit area, so visits and projects here are by arrangement. We'll agree any travel costs with you before anything is booked.
Useful details for planning a two-storey extension for a detached house in Isle of Mull.
- Postcode districts
- PA62, PA63, PA64, PA65, PA71 and PA72
- County / area
- Argyll and Bute, Scotland
- Price region
- Scotland
- Guide price
- £81,000–£108,500 (£1,930–£2,580 per m²)
- Approval route
- Planning permission is usually needed: Class 1B permitted development only applies if every part of the extension is at least 10 m from all boundaries. A building warrant is needed before work starts.
- Nearest towns
- Isle of Islay (49.1 miles), Oban (11.8 miles), Lochgilphead (31.2 miles)
- Distance to Helensburgh
- about 50.5 miles
- First visit
- By arrangement
About a two-storey extension for a detached house
A two-storey extension for a detached house is a two-floor addition to the side, rear or both of a house that stands on its own plot. Detached houses often have room on more than one side, so there is more choice of layout and fewer shared-wall issues. The design still needs to respect boundaries, neighbours' windows and the look of the house.
Around Isle of Mull we also work in Isle of Islay, Oban and Lochgilphead, and across the rest of Argyll and Bute. Postcode districts in and near Isle of Mull: PA62, PA63, PA64, PA65, PA71 and PA72.
What it costs in Isle of Mull
Using our Scotland rates, a two-storey extension for a detached house with a 3 m × 7 m footprint on two floors (42 m² of new floor space) comes to about £81,000–£108,500, including VAT. Bigger or more glazed designs cost more per m². We'll give you a written design-stage price first, then a fixed build price once the drawings are agreed.
| Spec | Per m² | A 3 m × 7 m footprint on two floors (42 m² of new floor space) |
|---|---|---|
| Essential | £1,770–£2,380 per m² | £74,500–£100,000 |
| Standard | £1,930–£2,580 per m² | £81,000–£108,500 |
| Premium | £2,310–£3,100 per m² | £97,000–£130,500 |
Planning and building standards in Isle of Mull
In Scotland, a detached house on a large plot may be able to use Class 1B permitted development if no part of the two-storey extension is within 10 m of any boundary, it is no higher than the house and is not in a conservation area. Otherwise a householder application costs £371. A building warrant is needed either way.
Approval in Scotland: Householder planning application: £371. Councils have two months to decide a local planning application.
Building standards: A building warrant from the council's building standards service before work starts, and a completion certificate at the end. Scotland uses its own Technical Handbooks.
Design points for Isle of Mull homes
Keeping it subordinate
Large detached houses can take a large extension, but councils still expect it to look secondary to the main house. A lower ridge, a modest set-back at the front and matching materials keep the proportions right, even on a wide plot.
Choosing the best side
On a detached house you can often extend on either side or the rear. We look at orientation for daylight, where the stairs and landing are, the distance to each boundary, drains and trees, so the extension goes where it adds the most useful space.
How we'd run your project
Visit by arrangement
We agree a visit to your home in Isle of Mull and any travel costs with you in writing first, then look at the structure, access and boundaries.
Design and approvals
We draw the extension and check it against the rules for Scotland, then apply for planning permission or a certificate of lawfulness, whichever fits.
Fixed price in writing
With approved drawings and calculations, we give you a fixed build price and a programme you can plan around.
Build
Foundations, walls, floor, roof, windows, then first and second fix. We break through into the house as late as we can.
Questions about two-storey extensions for detached houses in Isle of Mull
How long does a two-storey extension for a detached house take?
Allow 4 to 8 weeks for survey and design, then the approval period (councils have two months to decide a local planning application), then 4 to 8 weeks of technical design, which can overlap. The build itself usually takes 14 to 20 weeks, longer for large or complex designs.
Which postcodes do you cover around Isle of Mull?
We cover Isle of Mull (PA62, PA63, PA64, PA65, PA71 and PA72) and nearby places including Isle of Islay, Oban and Lochgilphead, plus the rest of Argyll and Bute. Visits and projects in Isle of Mull are by arrangement, with travel costs agreed in writing first.
Do I need planning permission for a two-storey extension for a detached house in Isle of Mull?
Isle of Mull is in Scotland. Planning permission is usually needed: Class 1B permitted development only applies if every part of the extension is at least 10 m from all boundaries. A building warrant is needed before work starts.
Can I extend a detached house on both sides?
Sometimes. With planning permission, a council may accept extensions on both sides if the house stays well proportioned and keeps gaps to the boundaries. It is more common to extend on one side and the rear, or with a wraparound. We look at the plot as a whole before suggesting more than one extension.
Is a detached house extension a better investment than moving?
It often costs less than the gap between your house and a larger one nearby, once property tax, legal fees and removal costs are counted, but that depends on your area. Extending also has limits: every street has a ceiling price. We give you build costs so you can compare them with local asking prices.
Nearby
Nearby towns we cover for two-storey extensions for detached houses:
Other extensions in Isle of Mull
- Rear
- Side
- Wraparound
- Part two-storey
- Over a garage
- First floor
- Semi-detached
- Kitchen and bedrooms
- Bedroom and en-suite
All two-storey extension services in Isle of Mull · Two-storey extensions for detached houses across Argyll and Bute
Send us your postcode and a few details. We'll get back to you to arrange a visit and talk through your options.